Automatic telegraphy



(No Model.)

P. B. DELANY. AUTOMATIC TELEGRAPHY.

No. 541,967. Patented July 2, 1895.

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PATRICK BERNARD DELANY, OF SOUTH ORANGE, NEW JERSEY.

AUTOMATIC TELE'GRAPHY.

$PECIFIGATION forming part of Letters Patent No. 541,967, dated July 2,1895.

7 Application filed April 3, 1895. Serial No.'544,318- (No model.)

To all whom it may concern.-

Be it known that I, PATRICK BERNARD DE- LANY, a citizen of the UnitedStates, residing at South Orange, in the county of Essex and State ofNew Jersey, have invented certain new and useful Improvements inAutomatic Telegraphy, of which the following is a specification.

This invention relates to the recording of received signals orcharacters in automatic telegraphy-more especially on chemicallyprepared paper by the action of the transmitted current impulses.

The object of my invention is to obtain such a record in which thedefinition of the recorded characters shall be clear and distinct and inwhich the arrangement of the charactersis such that the record on thereceiving ribbon may be read with certainty and facility at any ordinaryreading distance.

To this end my invention consists, first, in forming one of thecharacters, either the dot or dash, and preferably the dash, of agreater width transverse to the receiving ribbon than the othercharacter. Th us the dots may be arranged in one line and the dashes inanother line, either entirely or partly upon one or both sides of theline of dots. Preferably I form the dots by one stylus arranged in theordinary way, and the dashes bya bifurcated stylus, in other words bytwo styluses electrically united and arranged respectively onoppositesidesofthedotrecordingstylus. With such an arrangement the dotswould appear in one line and each dash would be represented by dots ormarks opposite each other, and on opposite sides of the line in whichthe dots are recorded; or a single dash finger or stylus may berelatively much wider in a direction transverse to the receiving ribbon,and may be arranged entirely on one side of the dot recording stylus. Inthe former arrangement the dot stylus and the two arms of the dashstylus may respectively have, as is ordinarily the case in chemicalreceivers, relatively fine or small points of contact that bear upon thereceiving ribbon. I prefer, however,

that the dot stylus, as well as the two styluses forming the dashrecorder, shall have a contact making surface bearing upon the ribbonrelatively wider in a line transverse to the ribbon, than in a linelongitudinal therewith. Such an increased width of contact is bestobtained by using for each contact finger or stylus two, three or morewires or small fingers arranged side by side. The increased width of thecontact surfacenof the stylus reduces the circuit resistance .at thatpoint so as to permit a freer passage of .the current impulse throughthe paper, thus facilitating the dis charge of the line, reducing thedelay in the discharge of the tailing current, and diffusing the delayedcurrent over the enlarged contact surface, thereby preventing materialprotracted discoloration of the ribbon.

Another feature of this invention consists in the system of automatictransmission and chemical reception in which I employ a perforatedtransmitting ribbon, all of the perforations representing dots beingarranged in one line, and all of the perforations representing dashesbeing arranged in another line. The perforations are of the same sizeand the transmitted impulses are of equal duration and may besuccessively of like or opposite polarity. The polarity of thetransmitted impulses depends upon whether its transmission is effectedby a dot perforation in one line or a dash perforation in another line.The dot and dash impulses thus transmitted are received and respectivelyrecorded in difiercnt lines on the chemically prepared ribbon. Thereceived record therefore shows the dot and dash characters respectivelyin different lines. In the accompanying drawings, Figure 1 is a detailview illustrating suchparts of a chemical receiver and automatictransmitter as are sufficient to illustrate my invention. Fig. 2 isaview showing a section of paper ribbon with chemically recordedcharacters thereon full size; Fig. 3, a detail view of anotherarrangement of recording styluses; Fig. 4, a view showing the charactersas they would be recorded by the arrangement of brushes shown in Fig. 3;Fig. 5, a detail view of another kind of recording stylus, and Fig. 6 aview showing the characteii's as they would be recorded by the stylus-esshown in Fig. 5.

The transmitter shown in Fig. l is a conventional illustration of anautomatic transmitter operated by a perforated ribbon. Of course suchorganization may be varied.

Inthe receiver A indicates the ordinary roll over which the chemicallyprepared ribbon B passes. L is the main line; D, the dot stylus, and Dthe dash stylus. Both styluses are mounted upon a block of insulatingmaterial. The dot tudinal to the ribbon.

brush may be connected with the line and the dash brush to earth.

At the transmitting station Eis the perforated transmitting ribbon; M B,the main battery; F F, the contact fingers, by means of which thecircuit is completed to the cylinder G through the perforations, andthence to line. The impulses of current are either successive currentsof like polarity or alternately currents of a dissimilar polarity. Asall the perforations are of the same size the transmitted impulses areof equal duration. Impulses of uniform polarity transmitted by the upperrow of perforations record dots at the receiver, such dots forming theupper line of characters on the receiving ribbon. The impulses ofcurrent of uniform polaritytransmitted through the lower line ofperforations are recorded as dashes on the receiving ribbon in the lowerline of characters. The general plan is, so far as I am aware, new withme. My invention, however, in addition to what has been above indicated,includes the idea of transmitting impulses of equal duration andrecording them by characters of different arrangement or area upon achemically prepared strip, the dot and dash characters being arranged indifierent lines.

In Fig. 1 the styluses D D are of greater thickness or width in a linetransverse to the ribbon than they are in a line longi- The dash brush Dis made wider than the dot brush and is shown therefore as being made upof a greater number of wires. The characters chemically recorded wheresuch a brush is used are indicated in Fig. 2. As indicated in Fig. 3 thedot finger or stylus may be placed centrally and that for the dashes bebifurcated, one leg thereof-lying upon each side of the dot stylus. Withsuch an arrangement the characters produced would be as indicated inFig. at. The opposite dash characters arranged one on each side of theline of dot characters would be read as one. In Fig. 5 the contactpoints or surfaces of the styluses are shown as each formed by a singlepoint or wire. The record with such an arrangement of styluses would beas indicated inFig. 6. The purpose of these arrangements is to insure aready distinction, in reading, between the dots and dashes. I shouldprefer to employ in practice the plan of reception indicated in the twolatter figures.

I claim as my invention 1. In an automatic telegraph, the combination ofa transmitting tape having perforations arranged in two rows, one rowbeing for transmitting dots and the other row for transmitting dashes,current transmitting mechanism by which the perforations in one rowrepresenting dots transmit impulses of current of one polarity, andperforations in the other to v representing dashes transmit currentimpulses of the opposite polarity, and a receiver having two stylusesresting on a chemically prepared ribbon in different longitudinal planevertical to the face of the ribbon, one of said styluses producing uponthe ribbon dots, when current impulses of one polarity are received, andthe other stylus producing dashes when current impulses of the oppositepolarity are received, such dot and dash characters being in differentlongitudinal lines on the ribbon substantially as set forth.

2. An automatic telegraph chemical receiver having two recordingstyluses, one of which has a greater area of contact surface in a linetransverse to the chemically prepared receiving ribbon than the otherstylus, the styluses being arranged in different longitudinal planesvertical to the face of the ribbon, whereby the chemically producedcharacters are developed in independent longitudinal lines on theribbon. v

8. In an automatic telegraph,the combination with a transmitter adaptedto be operated by a perforated tape to transmit currents eithersuccessively of the same or opposite polarity, and a chemical receiverhaving two recording styluses bearing upon the chemically preparedribbon, one of said styluses having a greater area of surface contactthan the other in a line transverse to the receiving ribbon.

4. In an automatic telegraph, a chemical receiver having a dotrecording, stylus and a dash recording stylus, one of which consists oftwo electrically united parts arranged respectively on opposite sides ofthe other stylus, substantially as set forth.

5. In an automatic telegraph, the combination of the receiver operatedby a perforated tape to send currentimpulses of one polarityrepresenting dots, and current impulses of another polarity representingdashes, and a chemical receiver having two recording styluses restingupon the chemically prepared ribbon, one for recording dots and anotherfor recording dashes, one of said styluses consisting of twoelectrically united parts arranged respectively on opposite sides of theother stylus, substantially as set forth.

6. In an automatic telegraph, the combination of a transmitter fortransmitting current impulses representing dots and current impulsesrepresenting dashes, and a receiver having recording devices that recordthe characters of one kind in one line and the characters of the otherkind in duplicate on opposite sides of the first named line ofcharacters.

7. A received ribbon record having characters representing say dots inone line, and characters representing say dashes in duplicate onopposite sides of the line of dots.

In testimony whereof I have hereunto subscribed my name.

PA'lRIOK BERNARD DELANY.

Vitnesses:

FRANK S. OBER, EDWARD C. DAVIDSON.

